6.5

CVE-2023-40184

Improper handling of session establishment errors in xrdp

xrdp is an open source remote desktop protocol (RDP) server. In versions prior to 0.9.23 improper handling of session establishment errors allows bypassing OS-level session restrictions. The `auth_start_session` function can return non-zero (1) value on, e.g., PAM error which may result in in session restrictions such as max concurrent sessions per user by PAM (ex ./etc/security/limits.conf) to be bypassed. Users (administrators) don't use restrictions by PAM are not affected. This issue has been addressed in release version 0.9.23. Users are advised to upgrade. There are no known workarounds for this issue.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Neutrinolabs ≫ Xrdp Version < 0.9.23
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.73% 0.493
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 6.5 2.8 3.6
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
security-advisories@github.com 2.6 1.2 1.4
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
CWE-755 Improper Handling of Exceptional Conditions

The product does not handle or incorrectly handles an exceptional condition.

https://github.com/neutrinolabs/xrdp/blame/9bbb2ec68f390504c32f2062847aa3d821a0089a/sesman/sesexec/session.c#L571C5-L571C19
Product
https://github.com/neutrinolabs/xrdp/commit/a111a0fdfe2421ef600e40708b5f0168594cfb23
Patch
https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-f489-557v-47jq
Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SOT237TIHTHPX5YNIWLVNINOEYC7WMG2/
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U5IXMQODV3OIJ7DRQBUQV7PUKNT7SH36/
Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/URO3FKTFBPNKFARAQBEJLI4MH6YS35P5/
Mailing List
https://lists.debian.org/debian-lts-announce/2025/05/msg00018.html